Follow him to MacGuffin's, then Sizzle, then to the Chinese Food stand. You can feed him a robot bird from the toy store. But he's still wandering around.
You don't. You have bigger problems. Besides, he might bring it back.
No one knows, and you do not have to find him. Eddie will come back to help out in the end.
Back Lot Island (April 2013)
You get a robot bird from Giuseppe's Toys. After you chase Eddie to MacGuffin's, then Sizzle, then the Chinese Food stand, you feed him the snake. But he just slithers off.
Follow the snake into the east end of the mall, to MacGuffin's, then to Sizzle, and finally back to the atrium at the Chinese food stand. Use the robot bird, but he swallows it and runs off.
You first run into the masked robber (complete with moneybag?) when you have fed Eddie the snake and go to check on a security outage at Carnival Costumes. You surprise him at MacGuffin's and get the key to the back room at Good Deals.
You are checking on Eddie the snake. He has gotten out of his tank and into the mall. Chase him left across the atrium to the other wing of the mall. He will be at MacGuffin's, then at Sizzle, then back in the food court at the Chinese Food stand.
Almost immediately. The effects wear off when you leave the salon.
There is no key to MacGuffin's or its back room. The key that you do recover fits the back room at Good Deals next door.
Once you have the key that says "back room" you only have to go next door to Good Deals, and use the toy robot by the camera to keep the lights on.
You do not get that key during the quest. The key that is eventually dropped in MacGuffin's fits the back room at Good Deals next door.
It doesn't fit the door at MacGuffin's. Try next door at Good Deals. You can use the toy robot to keep the lights on.